Refrax is a performance and feature-focused Minecraft shaderpack for Iris.
| Profile | Target FPS |
|---|---|
| Potato | 160+ |
| Low | 125+ |
| Medium | 90+ |
| High | 65+ |
| Very High | 40+ |
| Extreme | 25+ |
| Overdrive | ~20 |
I saw a ~25 fps boost on 1.18.2, 20+ fps boost on 1.20.1 and ~15 fps boost on 1.21.1.
These values can be bumped higher by changing the performance mode slider at very little visual compromise even at overdrive performance mode (You'll only notice it in certain situations. It mainly reduces the sample count of clouds, god rays, AO, SSR, and water wave octaves, most noticeable of which are reflections and water which will be tuned to be less noticeable in the future).
1.18.2 and higher versions should all work just fine.
1.16.5 - No colored lighting and no block breaking particles. 1.17.x, 1.18 - Does not load the shader 1.18.1 - Does not render a lot of blocks.
- Install Iris.
- Copy the Refrax.zip to
.minecraft/shaderpacks/or the shader folder of your launcher's instance. - Select the shader in the Iris menu and enjoy!
See LICENCE.txt.
Refrax is original source, inspired by Photon, Complementary Reimagined, Bliss, Solas, MakeUp Ultra Fast, Super Duper Vanilla, published graphics research, and the Iris shader documentation.
AMD for Contrast Adaptive Sharpening (CAS) and FidelityFX Super Resolution 1 (EASU + RCAS) — see cas.glsl and fsr1.glsl for the implementations and the MIT licence they are ported under.